I used kerosene in my 1999 Jeep Wrangler instead of gasoline?

I picked up the wrong tank in the garage, it wasn't labeled for that matter. And poured in about one and a half gallons of kerosene. I went about eighteen miles on it when the Jeep, after I pressed the accelerator to the floorboard trying to get up some hills, because it's a 4 Cylinder Jeep, started to making a loud noise like the exhaust pipe was rattling. Now it's sitting in the driveway, I haven't started it up since I got it home. My question is what should I do?